108 lines
4.1 KiB
C
108 lines
4.1 KiB
C
/*
|
|
* Crypto engine API
|
|
*
|
|
* Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
*/
|
|
#ifndef _CRYPTO_ENGINE_H
|
|
#define _CRYPTO_ENGINE_H
|
|
|
|
#include <linux/crypto.h>
|
|
#include <linux/list.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/kthread.h>
|
|
#include <crypto/algapi.h>
|
|
#include <crypto/hash.h>
|
|
|
|
#define ENGINE_NAME_LEN 30
|
|
/*
|
|
* struct crypto_engine - crypto hardware engine
|
|
* @name: the engine name
|
|
* @idling: the engine is entering idle state
|
|
* @busy: request pump is busy
|
|
* @running: the engine is on working
|
|
* @cur_req_prepared: current request is prepared
|
|
* @list: link with the global crypto engine list
|
|
* @queue_lock: spinlock to syncronise access to request queue
|
|
* @queue: the crypto queue of the engine
|
|
* @rt: whether this queue is set to run as a realtime task
|
|
* @prepare_crypt_hardware: a request will soon arrive from the queue
|
|
* so the subsystem requests the driver to prepare the hardware
|
|
* by issuing this call
|
|
* @unprepare_crypt_hardware: there are currently no more requests on the
|
|
* queue so the subsystem notifies the driver that it may relax the
|
|
* hardware by issuing this call
|
|
* @prepare_cipher_request: do some prepare if need before handle the current request
|
|
* @unprepare_cipher_request: undo any work done by prepare_cipher_request()
|
|
* @cipher_one_request: do encryption for current request
|
|
* @prepare_hash_request: do some prepare if need before handle the current request
|
|
* @unprepare_hash_request: undo any work done by prepare_hash_request()
|
|
* @hash_one_request: do hash for current request
|
|
* @kworker: thread struct for request pump
|
|
* @kworker_task: pointer to task for request pump kworker thread
|
|
* @pump_requests: work struct for scheduling work to the request pump
|
|
* @priv_data: the engine private data
|
|
* @cur_req: the current request which is on processing
|
|
*/
|
|
struct crypto_engine {
|
|
char name[ENGINE_NAME_LEN];
|
|
bool idling;
|
|
bool busy;
|
|
bool running;
|
|
bool cur_req_prepared;
|
|
|
|
struct list_head list;
|
|
spinlock_t queue_lock;
|
|
struct crypto_queue queue;
|
|
|
|
bool rt;
|
|
|
|
int (*prepare_crypt_hardware)(struct crypto_engine *engine);
|
|
int (*unprepare_crypt_hardware)(struct crypto_engine *engine);
|
|
|
|
int (*prepare_cipher_request)(struct crypto_engine *engine,
|
|
struct ablkcipher_request *req);
|
|
int (*unprepare_cipher_request)(struct crypto_engine *engine,
|
|
struct ablkcipher_request *req);
|
|
int (*prepare_hash_request)(struct crypto_engine *engine,
|
|
struct ahash_request *req);
|
|
int (*unprepare_hash_request)(struct crypto_engine *engine,
|
|
struct ahash_request *req);
|
|
int (*cipher_one_request)(struct crypto_engine *engine,
|
|
struct ablkcipher_request *req);
|
|
int (*hash_one_request)(struct crypto_engine *engine,
|
|
struct ahash_request *req);
|
|
|
|
struct kthread_worker kworker;
|
|
struct task_struct *kworker_task;
|
|
struct kthread_work pump_requests;
|
|
|
|
void *priv_data;
|
|
struct crypto_async_request *cur_req;
|
|
};
|
|
|
|
int crypto_transfer_cipher_request(struct crypto_engine *engine,
|
|
struct ablkcipher_request *req,
|
|
bool need_pump);
|
|
int crypto_transfer_cipher_request_to_engine(struct crypto_engine *engine,
|
|
struct ablkcipher_request *req);
|
|
int crypto_transfer_hash_request(struct crypto_engine *engine,
|
|
struct ahash_request *req, bool need_pump);
|
|
int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
|
|
struct ahash_request *req);
|
|
void crypto_finalize_cipher_request(struct crypto_engine *engine,
|
|
struct ablkcipher_request *req, int err);
|
|
void crypto_finalize_hash_request(struct crypto_engine *engine,
|
|
struct ahash_request *req, int err);
|
|
int crypto_engine_start(struct crypto_engine *engine);
|
|
int crypto_engine_stop(struct crypto_engine *engine);
|
|
struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);
|
|
int crypto_engine_exit(struct crypto_engine *engine);
|
|
|
|
#endif /* _CRYPTO_ENGINE_H */
|